I have a 1 MVA diesel generator, 11 kV line to line (medium voltage.) To test this generating set, I connected it to industrial load (heaters only with a pf = 1 via a 11 kV to / 380 V transformer.
I now measure that the overall power factor is 0.44 lag and this value is far too low.
Does anyone have any idea of what the problem is?
Here is the transformer data:
Here is the measured result: